Question

Help! Any formulas??? Any help???

Evaluate this expression: -|2√9| + 2

A. -8
B. -4
C. 4
D. 8

Answer 1

Am I the only one who sees a bunch of question marks?

Answer 2

I see a ton of question marks, haha. Could you rewrite it please?

Answer 3

Don;t copy and paste though, cause it will still appear ?

Answer 4

Maybe a screenshot of the problem typed out would be better?

Answer 5

Sure.

Answer 6

Here.

Answer 7

You just need to solve it. First, lets get rid of the sqrt (squareroot). What is the sqrt of 9?

Answer 8

3

Answer 9

So -|2+3| +2
Now solve what's in the absolute value.

Answer 10

-|6| + 2.
So, since it is an absolute value of -6, then 6'll be positive? And then will it come out to positive 8?

Answer 11

Remember, the negative sign is OUTSIDE the absolute value sign. You are just finding the absolute value of 6.

Answer 12

And then you add the negative.

Answer 13

Soooo..-4?

Answer 14

-6 + 2 is =4, right? Then there you go! Glad I could help!

Answer 15

Thanks so much!

Answer 16

Yep!

Answer 17

To best show your appreciation, you can give me a medal. :) xD

Answer 18

Um, I have just one more. I know the others after this one. I just want to know if there is another way than guess and check.

Answer 19

Ah, will do.

Answer 20

Okay let's check out that other one.

Answer 21

What can it not be for it to be more than zero?

Answer 22

x can't = 0, right?

Answer 23

That too, but what else can the whole thing not equal?

Answer 24

Negative numbers?

Answer 25

Yep, so x can't be something that will equal negative once cubed or squared. If you square a number, can it equal negative?

Answer 26

Nope

Answer 27

So which answer can you eliminate?

Answer 28

B

Answer 29

Yep. But what does the last one say, I can't read it. Is it squaring or cubing the x?

Answer 30

Cubing. So, can I eliminate that one, too?

Answer 31

Can you have more than one answer?

Answer 32

Well, if a cubed number can equal negative, then yes.

Answer 33

As far as I know, there is rarely more than one answer.

Answer 34

Yeah, never mind there is only one answer. So now that you have eliminated two, you are left with
1/x^2 > 0
1/x^2 + 1
Lets start with the first one. Is there a number x can be that will be negative or equal 0?

Answer 35

Yes

Answer 36

Then can that be an answer?

Answer 37

1/-3^2 is greater than 0, right? 0.1 repeated. I just tried a number out for x.

Answer 38

So, I think the first one can be an answer.

Answer 39

Yes, that would be greater than x. But what about if x = 0?

Answer 40

You can't divide by 0. So, that leaves C as the only answer.

Answer 41

There you go.

Answer 42

Thanks!

Answer 43

Aw thanks for becoming my fan! :) And you're welcome!

Answer 44

Make sure to close the question.

Answer 45

No problem! :) Well, that's all I've got. I'll be finishing up. Thanks again!

Answer 46

Yep!